Electromagnetic apparatus



Patented June 1, 1926.

UNITED STATESPATENT OFFICE.

GEORGE FUSSNER, OF MENOMINEE, MICHIGAN, ASSIG'NOR TO SIGNAL ELECTRIC i MFG. CO., CORPRATION OF MICHIGAN.

ELECTROMGNETIC APPARATUS.

My present invention relates to electromagnetic apparatus and with regard to the more specific features thereof to relays for transmitting a signal concurrently to a plurality of stations.

An object of the invention is to provide ay construction for the above purpose, which shall be particularly simple, rugged and inexpensive.

Another object is to provide a compact apparatus of the above type, in which a substantial number of separate circuits can be reliably controlled concurrently without the likelihood of mechanical or electrical interference between conductors or circuits.

The invention is applicable to re and burglar alarm, factory call, landother signalling systems, and, in general, to systems of that type in which a signal is to be concurrently transmitted to a plurality of stations.

According to a feature of the invention, the armature of a single electromagnetic relay concurrently controls the circuits to all of the stations. Preferably the armature carries a plurality of electrical contacter elements for engagement and dissengagement with contacts carried by astationary insulating support. In the specific and preferred embodiment shown, the stationary contacts with associated binding posts are carried by an insulating plate which is, in turn, mounted upon the coil structure. The contactors carried upon the armature are ireferably bridging Contact blades each to cle-se circuit between tivo' or more of the binding posts, in order to connect a source of electricity with ene or more signal registering or indicating instruments at difierent stations.

According to another feature of the in vention, the insulating plate that carries the contacts is preferably fitted over the end of the magnetic core structure, projecting beyond the coil, so that the armature may be pivoted in the same position with respect to the core as if the insulating plate were not provided, and the magnetic reluctance of the apparatus is not increased.

According to another feature, the insulating plate carries a back stop, spaced therefrom by a small gap to 'limit the separa tion of the armature from the coil and the back stop may carry adjusting means for positioning` the armature, or, if desired, further electrical contacts.

In the accompanying drawings in which is shown one of various possible embodiments of the several features of this invention,

Fig. 1 is a plan view,

Fig. 2 is a side elevation,

Fig. 3 is a sectional View taken along the line 3-3 of Fig. 2,

Fig. i is an end elevation,

Fig. 5 is a detail view partly in section of one of the electromagnets and associated parts, and; i

Fig. 6 is a dia-gran'imatic View of circuits.

Similar reference characters refer to similar parts throughout the several views of the drawings. j

'I his invention has certain features in common with that of my copending application, Serial No. eltlAS/T, filed July 7th, 1920, in which is claimed the subject-matter common to the two inventions.

Referring now to the drawings, there is shown a base 1 preferably of wood mounted upon a metallic supporting frame 2. A stamped or sheet brass standard 3 has a foot 4L. secured to the base by screws as at 5, and an upstanding leg G to which the ele-ctromagnet unit 7 is secured with its axis extending parallel to the base. rIhe unit 7 preferably comprises a magnetic cross-bar or piece 8 centrally secured to the upstanding leg G of the standard preferably by a pair of screws To the cross-bar 8 are secured preferably by screws as at 10 and in parallel relation, the magnetic cores 1l... The electromagnetic coils or solenoids 1Q encircle the cores with the insulating disks 13 one end therecf against lthe cross-piece 8. The cores project at their free ends for the usual small distance as at 14 beyond the opposite disks 15:3 on the solenoids. j

A generally rectangular insulating plaie 15 is carried jupon .the coil structure. opeuings 16 in said plate being frictionally fitted over the preferably lrnurled projecting vends 17 of the core structure. The plate l5 extends upwardly from the coils, as sho-wn. and its corners-maybe rounded asA at 1S near the bottom to avoid interference with adjoining parts, and is in snug contact with the end disks 13". the extreme ends of the cores 'extending slightly beyond the plate as il O fil

limits could be mounted thereon, and the contactors upon the armature could be similarly multiplied and arranged in as many or as ew mutually insulated groups as desired, depending on the. purpose to which the apparatus is to be applied.

In the preferred embodiment ot my inveir tion, it will be noted that the base carries merely the binding posts 56 through which the current impulse is directed to the electromagnet, the binding posts for the plurality of relay circuits being all conveniently mounted upon the insulatingl plate l5, which may without requiring any alteration in the. dimensions ot the ordinary relay base, be made ot suilicient size to accommodate the desired number ot binding posts. The insulating plate carrying the binding posts being mounted upon the projecting ends ot the electromagnetic cores, in etliect, takes up no useful space whatsoever and does not in any way atleet the reluctance of the niagnetic circuit, theair gap between the. cores and the armature not being increased with respect to constructions in which t-he cores are not employed as supporting means tor other elements.

lt should also be noted that the elect-rd magnetic coil could be mounted in other positions with respect to the base, that the base and coil anis could either or both be in a `vertical plane, if desired, and that the invention -could be carried out with a coil having but a single core. l prefer, however, the specific arrangement shown and described.

lt will thus be seen that there is herein described apparat-us in which the several features of this invention are embodied, and which apparatus in its action' attains the various objects of the invention and is well suited to meet the requirements ol' practical use.

As many changes could be made in the above construction, and many apparently widely different embodiments of this invention could be made without departing 'from the scope thereof, it is intended that all mat ter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

l claim 2- l. rllhe combination in electromagnetic apparatus, of an electromagnetic coil, a core therein projecting therebeyond, an insulating plate iitted over said core and extending laterally beyond said coil, an armature under control ot said coil and adjacent the tree end et said core, and coacting contact means on said insulating plat-e and said armature vtor closing an electric circuit when the armature is in one ot' its eXtreme positions.

2. The combination in electromagnetic apparatus of a pair of parallel electromagnetic coils having cores projecting therebeyond,

an insulating plate having recesses iitted over the projecting ends ot said cores and tightly retained in place thereon, an armature beyond said plate and adjacent the projecting ends ol: said cores and coacting electrical contact means carried by said armature and said plate tor closing and opening an electric circuit in response to movement of the armature.

3. The combination in electromagnetic apparatus ot a base, an electromagnetic coil carried thereon, an insulating plate adjacent said coil, a pair ot binding posts extending through said plate and having contacts at one side thereof, and an armature tor said coil at the side ot said plate adjacent said contacts, said armature carrying electrical conducting means for bridging said contacts to close a circuit through said binding posts.

e. The combination in electromagnetic apparatus of an electromagnetic coil, a inagnetic core therein extending therebeyond, an insulating plate having an aperture litt al over said projecting core end, an armature adjacent said projecting core end,I a pair ot binding posts carried by and extending through said plate at a distance troni said coil, each having a Contact adjacent said armature, and a contacter carried by said armature it'or closing a circuit between said binding posts.

5. The combination in electromagnetic apparatus of a support, an electromagnetic coil carried by said support and extending parallel thereto, said coil l'iaving a core extending therebeyond, an insulating plate tightly iitted over said projecting core end yand extending at right angles to said support, a pair of binding posts at the side ot said late ad`acent said coil and at eaual distance from said support, each having an associated contact at the opposite `ot said plate, an armature pivoted to said support adjacent the projecting end ot said core, and a Ll-shaped metal contacter cari d by said armature for bridgi. the ctunacts when the coil is energized.

6. The combination in electron t, paratus of a suppor, a pair pa el coils carried by said support, cach having a core extending therebeyond, an irm lating plate tightly iitted over said projc core ends and extending at right angl to .id support, a plurality of binding posts at the side ot said plate adjacent said coil and at equal distance trom said support, each having a contact associated therewith, and a plurality ot contacter elements carried by said armature and insulated with respect to each other, all said contactors being `shifted by the movement otl said armature toward and away from the coil for closing or opening the circuit between the associated contacts.

7. rlhe combination in electromagnetic apparatus of a base, an electromagnetic coil thereon having a core projecting therebeyond, an insulating plate tightly litting over said core, a pair of bindingl posts niounted on said insulating plate and at sub stantially eipial distance troni said core, c n

.r 'zifciated with said bin ling ijiosts and at the side thereoltI reinote Atroni said coil, an armature pivoted adjacent said plate, a U- shaped springnietal blade secured at its base to said armature and having; its legs project ing there't'roni to inale a bridging connection between the contacts associated with said binding' lposts atter the arn'iature has moved upon change ol. current through .said coil.

8. The combination in electroniaggnetf zapparatus et a. base, a standard secured thereto, an electromagnetic. coil secured to said standard and extending parallel to said base, said coil havinpi a core extendingl therebeyond, an insulating plate tightly litting over said core and eritendii'ig at right angles to said base, a plurality ot' binding posts carried by said plite and equi-distant 'troni said base, and at the side thereol adjacent said coil, each said binding,` post having a contact at the side thereof reniete troni said coil, an zwinature pi'voted to said base adj acent said projectingl core end, a sheet metal nieniber secured to said ari'i'iature and luv-.fi a plurality et tongues, a second sheet metal nieinber secured to said armature and insulated lroni said lust sheet nietal nieinber and having a plurality ot tongues, the end ot each said tongue extending into proiinity ot a cerrespondinfbl contact, whereby upon nioveinent et said arn'iature by said coil, each oi said spring metal inenibers will bridge the associated contacts for eitectingi circuit connections.

9., rthe combination in electronrL `nietic apparatus, oit a horizontal base, a standard secured thereon, an electroniagnet comprisingl a pair o'lz cores parallel to said base inounted upon seid stan-tard and projecting to one sid-e thereof, solenoids surrounding;v said cor-es, an insulating plate secured to the ends ot' said cores reinote 'troni said standard, au armature l "voted to said base and extending adjacent the prtu'ecting ends ot' said cores, a plurality ot binding posts carried on said plate above said electroniagnet and at 'the side thcreolI adjacent said standard, each said binding post extending` throiigh said plate and having a contact at `he opposite side thereo', a plurality oli prinjy nietal s D blades secured to said armature ttor coaction with said contacts, means normally urging said armature away troni said electromagnet, and back stop ineans carried by said plate tor limiting the ez-:tent ot separation.

lt). ln electroinae'netic apparatus, in eon1- bination, a base, a standard supported tlereon, an electroinagnet con'iprising,- a pair oil: cores supported by said standard and extending parallel to said base, electromagnetic coils encircling said cores, an insulating support plate litted trictionally over the ents ot' said cores remote troni said standY ard, a back stop plate spaced troni said support plate and supported thereon near the upper edge thereof, an armature piroted to said base, contact blades carried by said armature, bindingposts carried by said plate at the side thereof adjacent said coils, and contacts on said posts adjacent said blades to be contacted by the latter tor circuit closure.

ll. y'lhc combination in -electron'iagnetic apparatus ot a base, a standard secured thereon, electromagnetic coil ineans supported at one end by said standard, an armature adjacent the opposite end ot said coil ineans, and an insulating eienient carried by said coil ineans adjacent said latter end, said elei'nent hai/'ing parts extending on opposite sid-cs ot said armature, and a plurality ot electrical contacts carried thereby.

l2. 'l`he conioination in a relay, oi" a base, a standard secured thereon, electromagnetic coil ineens supl'iorted at one end by said stand: l, an insulating support ,carrying -a pair o; contacts and in turn carried by the end ot said coil ineans, an armature adjacent saiC support, and a contacter en said ai'n'iatin'e adapted to bridge said pair o'ticontucts.

ll. The coi'nbination in a relay ol a base, a standard secured thereon, an electromagnct comprising a pair ot' cores parallel. to said base inounted upon said standard and projecting' to one side thereof, solenoids surrounding said cores, an insulating plate secured te the ends et said cores remote troni said e' nderd, a Contact carried by said plate and an armature pivoted to said base l lnii'in'r a Contact toi; cmi-tion with said lust Contact.

ligrned at lil e, niensniinee and State ot l. day ot November A. l). 192i.

GE O ll G ll l? ll til ffl E lil it 

